Question 1

The string method isnumeric returns True if the string contains only digits or False otherwise.

Accepted Answer

A) True 
 B)False

Question 2

When a sender of information encrypts that information, what is the resulting text known as?

Accepted Answer

A)   plain text
B)   garbage text
C)   cipher text
D)   junk textE) A) and B)
F) All of the above

Question 3

What string method can you use to locate the lowest index in a string named s where substring "findme" is found?

Accepted Answer

A)   s.locate("findme") 
B)   s.find("findme") 
C)   s.grep('findme') 
D)   s.search("findme") E) None of the above
F) A) and C)

Question 4

What os.path module function can you use to convert a path to a pathname appropriate for the current file system?

Accepted Answer

A)   localize(path) 
B)   system(path) 
C)   convert(path) 
D)   normcase(path) E) A) and D)
F) B) and D)

Question 5

In Python, all data values are objects.

Accepted Answer

A) True 
 B)False

Question 6

The file method write expects a single string as an argument.

Accepted Answer

A) True 
 B)False

Question 7

When using the open function to open a file for output (i.e., using 'w' as the mode string), if the file does not exist, Python raises an error.

Accepted Answer

A) True 
 B)False

Question 8

When used with strings, the left operand of Python's in operator is a target substring and the right operand is the string to be searched.

Accepted Answer

A) True 
 B)False

Question 9

When using the open function to open a file for input (i.e., using 'r' as the mode string), if the file does not exist, Python raises an error.

Accepted Answer

A) True 
 B)False

Question 10

What is the value of the binary number 10010110 in base-10?

Accepted Answer

A)   144
B)   150
C)   169
D)   232E) C) and D)
F) A) and C)

Question 11

What is the decimal number 98 in binary?

Accepted Answer

A)   110010‬
B)   1100011
C)   1100010‬
D)   ‭1110010‬E) B) and D)
F) All of the above

Question 12

You are running a Python script that is supposed to write data to an open file, but discover that the file contents are not updating even after the script finishes. What is most likely the issue?

Accepted Answer

A)   The file was opened using 'w' instead of 'b' as the mode string.
B)   The file is not being updated because it doesn't exist.
C)   The file is not being written to using the dump()  method.
D)   The file was not closed using the close()  method.E) C) and D)
F) None of the above

Question 13

A legacy program is outputting values in octal format, and you need to translate the octal to hexadecimal. What is 173 in octal expressed as a hexadecimal value?

Accepted Answer

A)   FA
B)   7B
C)   5D
D)   9CE) A) and B)
F) A) and C)

Question 14

Some applications extract portions of strings called characters.

Accepted Answer

A) True 
 B)False

Question 15

A binary number is sometimes referred to as a string of bits or a bit string.

Accepted Answer

A) True 
 B)False

Question 16

All data output to or input from a text file must be strings.

Accepted Answer

A) True 
 B)False

Question 17

After input is finished, another call to read returns an empty string to indicate that the end of the file has been reached.

Accepted Answer

A) True 
 B)False

Question 18

What does the os module function remove do when called?

Accepted Answer

A)   It removes a given file or directory that is passed to it.
B)   It removes a given directory that is passed to it.
C)   It removes a given file that is passed to it.
D)   It removes a given symbolic link file and it's associated inode.E) None of the above
F) B) and C)

Question 19

You are parsing a comma separated value string with Python. What method can you use to separate the values in each line and place them in a list?

Accepted Answer

A)   string.split(',') 
B)   string.delimit(',') 
C)   string.parsetolist(',') 
D)   string.strip(',') E) A) and D)
F) B) and C)

Question 20

What os module function should you use to get the path of the current working directory?

Accepted Answer

A)   getcwd() 
B)   cwd() 
C)   getpwd() 
D)   showcwd() E) All of the above
F) None of the above

Exam 4: Strings and Text Files

When used with strings, the left operand of Python's in operator is a target substring and the right operand is the string to be searched.

Correct AnswerverifiedShow Answer

After input is finished, another call to read returns an empty string to indicate that the end of the file has been reached.

Correct AnswerverifiedShow Answer

What os.path module function can you use to convert a path to a pathname appropriate for the current file system?

Correct AnswerverifiedShow Answer

A legacy program is outputting values in octal format, and you need to translate the octal to hexadecimal. What is 173 in octal expressed as a hexadecimal value?

Correct AnswerverifiedShow Answer

What does the os module function remove do when called?

Correct AnswerverifiedShow Answer

You are parsing a comma separated value string with Python. What method can you use to separate the values in each line and place them in a list?

Correct AnswerverifiedShow Answer

The string method isnumeric returns True if the string contains only digits or False otherwise.

Correct AnswerverifiedShow Answer

You are running a Python script that is supposed to write data to an open file, but discover that the file contents are not updating even after the script finishes. What is most likely the issue?

Correct AnswerverifiedShow Answer

What os module function should you use to get the path of the current working directory?

Correct AnswerverifiedShow Answer

What is the value of the binary number 10010110 in base-10?

Correct AnswerverifiedShow Answer

When using the open function to open a file for output (i.e., using 'w' as the mode string), if the file does not exist, Python raises an error.

Correct AnswerverifiedShow Answer

The file method write expects a single string as an argument.

Correct AnswerverifiedShow Answer

Some applications extract portions of strings called characters.

Correct AnswerverifiedShow Answer

What is the decimal number 98 in binary?

Correct AnswerverifiedShow Answer

What string method can you use to locate the lowest index in a string named s where substring "findme" is found?

Correct AnswerverifiedShow Answer

In Python, all data values are objects.

Correct AnswerverifiedShow Answer

When a sender of information encrypts that information, what is the resulting text known as?

Correct AnswerverifiedShow Answer

All data output to or input from a text file must be strings.

Correct AnswerverifiedShow Answer

When using the open function to open a file for input (i.e., using 'r' as the mode string), if the file does not exist, Python raises an error.

Correct AnswerverifiedShow Answer

A binary number is sometimes referred to as a string of bits or a bit string.

Correct AnswerverifiedShow Answer

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